Originally posted by columbus Yep, I'm ok with that. I have a DA 16-45 f/4 already, so I'm covered for wide angle for now.
That's a good one- you're fine. You might still possibly consider that DA 18-135mm all-arounder at some point due to versatility, great AF, and it has WR construction like your camera. It is also far lighter than your Tamron 28-75mm for carrying when you don't need that f/2.8 aperture. It can keep to f/3.5-4..5 out to 70mm. With Nikon or Canon, for instance, you cannot shop new cameras that have WR construction until getting into at least the $1,000 USD range on up while Pentax now has it through the entire lineup. Shopping new lenses with those other brands will likewise be $1,000 up for WR. A camera cannot be actually WR unless having a WR lens on it.
As to telephoto, with the K-5 IIs, there is the HD 55-300mm f/4-5.8 ED WR, which I have and like very much- and still available new, and with a K-3 or later model there is the later HD 55-300mm f/4.5-6.3 ED WR which is one of the few having the new and extra-fast PLM AF. I still hang happily with my older one, as its old reliable screw-driven AF is good enough for my needs, and image quality is close between them. They are both bargain lenses for what they bring.